Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8833149736c469…

MALICIOUS

PDF

41.5 KB Created: 2020-10-02 04:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 78ea12d874d422251c69b88a6fa30270 SHA-1: f153af6c13d5426069aa6b2a604373943b579bdf SHA-256: 6c8833149736c4692f812e4291ae574a0de3e2984ccae39bacebf2c0aaa6565b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=callaway+big+bertha+3+hybrid+adjustment+guide In PDF document text
    • http://files.summeroffootball.com/uploads/1/3/0/7/130739924/vunakugarorez.pdfIn PDF document text
    • http://zibono.cepohio.com/uploads/1/3/1/4/131406390/511169.pdfIn PDF document text
    • http://files.needforkeys.com/uploads/1/3/1/0/131071157/fujaxevekoxo-xopuvawuwa-lipafipuri.pdfIn PDF document text
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdfIn PDF document text
    • http://vadezolim.dreamingbillabong.com/uploads/1/3/1/6/131637312/1fbbcfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/darwins_natural_selection_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/sense_organs_worksheet_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7380/5982/files/leniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6724/7258/files/52143217935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6723/4714/files/rexarusenaluk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/gibobotoxuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5509/9287/files/zapupivodofexaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2240/3752/files/lezeronezizavive.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 5720 bytes
SHA-256: eb6029fa9a014428c9a6b0d7ed8613be4955ca354784e494e72a8016ee3c060c
font_01_sfnt_off00007584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 9864 bytes
SHA-256: e031176ce5453cc76d2fefca05c6be64b0b412be21bd252b8996d7b15e115f34